Computer monitor



FIG. 1 is a perspective view of the top, front and right side of a computer monitor showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view thereof the undisclosed left side view is a mirror image;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a computer monitor, as shown and described. 